South Umpqua HUC8 17100302
A 4,665 km² sub-basin of the Pacific Northwest region in OR. Drought coverage is from the US Drought Monitor (map of 2026-09-01); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
55
Moderate
Drought index
351
Extreme
Area in D2+
100%
0% exceptional (D4)
Gauges below normal
0%
of 7 reporting
Median flow
147%
p75 of record
Water assets
354
144 springs · 133 wells
USGS gauges (9)
- WEST FORK COW CREEK NEAR GLENDALE, OR143095007 cfsp38 · normal
- COW CREEK NEAR AZALEA, OR1430900044 cfsp71 · normal
- ELK CREEK NR DREW, OR143085001 cfsp75 · above normal
- COW CREEK NEAR RIDDLE, OR1431000074 cfsp75 · above normal
- SOUTH UMPQUA RIVER NEAR BROCKWAY, OR14312000162 cfsp76 · above normal
- COW CREEK ABV GALESVILLE RES, NR AZALEA, OR.1430899010 cfsp76 · above normal
- SOUTH UMPQUA RIVER AT TILLER, OR1430800079 cfsp79 · above normal
- S UMPQUA RIVER AT CANYONVILLE, OR1430891071 cfsno long-term record
- SOUTH UMPQUA RIVER AT MELROSE, OR14312330195 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 351 | 100 | 0/7 | p75 |
Top water assets
- 762 Unn Strs — Miningspring
- 76Cow Creek — Irrigationspring
- 76Starveout Creek — Miningspring
- 73Cow Creek — Irrigationspring
- 73Cow Creek — Industrial/Manufacturing Usesspring
- 73Lehman Reservoir — Miningspring
- 73Cow Creek — Irrigationspring
- 73Cow Creek — Irrigationspring
- 73Pit Well — Commercial Useswell
- 73South Umpqua River — Irrigationspring